Nordithen Nailo

The first instant or sorcery spell you cast each
turn can't be countered.
Instants and sorceries you cast cost {1} less to cast.
{2}{u/r}{u/r}: Exile Nordithen Nailo, then return him
to the battlefield transformed under his owner's control. Activate this ability only if there are
four or more instants and/or sorceries in your graveyard.